docker-registry-cleaner

Docker-Registry-Cleaner

n. person responsible for scrubbing a ship's deck.

Docker-Registry-Cleaner inspects images of a Docker Registry and removes those older than a given age.

Thanks

https://github.com/fraunhoferfokus/deckschrubber

Quick Start

go install github.com/yxxhero/docker-registry-cleaner
$HOME/go/bin/docker-registry-cleaner

Why this?

We run our own private registry on a server with limited storage and it was only a question of time, until it was full! Although there are similar approaches to do Docker registry house keeping (in Python, Ruby, etc), a native module (using Docker's own packages) was missing. This module has the following advantages:

• Is binary!: No runtime, Python, Ruby, etc. is required
• Uses Docker API: same packages and modules used to relaze Docker registry are used here

Arguments

-day int
      max age in days
-debug
      run in debug mode      
-dry
      does not actually deletes
-latest int
      number of the latest matching images of an repository that won't be deleted (default 1)      
-month int
      max age in months
-registry string
      URL of registry (default "http://localhost:5000")
-repo string
      matching repositories (allows regexp) (default ".*")      
-repos int
      number of repositories to garbage collect (default 5)
-tag string
      matching tags (allows regexp) (default ".*")      
-ntag string
      match everything but this tag (allows regexp) (default empty)
-v    shows version and quits
-year int
      max age in days
      
      

Registry preparation

Docker-Registry-Cleaner uses the Docker Registry API. Its delete endpoint is disabled by default, you have to enable it with the following entry in the registry configuration file:

delete:
  enabled: true

See the documentation for details.

Examples

• Remove all images older than 2 months and 2 days

$GOPATH/bin/docker-registry-cleaner -month 2 -day 2

• Remove all images older than 1 year from http://myrepo:5000

$GOPATH/bin/docker-registry-cleaner -year 1 -registry http://myrepo:5000

• Analyize (but do not remove) images of 30 repositories

$GOPATH/bin/docker-registry-cleaner -repos 30 -dry

• Remove all images of each repository except the 3 latest ones

$GOPATH/bin/docker-registry-cleaner -latest 3 

• Remove all images with tags that ends with '-SNAPSHOT'

$GOPATH/bin/docker-registry-cleaner -tag ^.*-SNAPSHOT$